chore(repo): close response bodies to prevent resource leaks

[xqqp]

• close response bodies to prevent resource leaks ("The caller must close the response body when finished with it", see https://pkg.go.dev/net/http)
• add bodyclose linter to linter config

[xqqp]

@mangalaman93 The errors are now logged outside of test files.

[xqqp]

Thank you for the update. Could you also update to use %v instead of %s in the glog so that it gets logged correctly. While you do that, you could also keep the structure like this (this is a nit):

      if err := resp.Body.Close(); err != nil {
          glog.Errorf("Error while closing response body: %v", err)
      }

Done